Senior System Administrator – TS/SCI Poly, VMware & Windows

MANTECH; Laurel (MD); On-site; USD 110,000 - 150,000; Full time

Job summary

MANTECH in Laurel, MD seeks an experienced System Administrator to join our Enterprise Infrastructure Services team. You will help deliver enterprise infrastructure capabilities for a national defense mission, supporting Windows Server, VMware, AD, and cross-platform integration.

This role requires 20 years of systems engineering/administration experience, TS/SCI with Polygraph, and hands-on expertise with Windows Server, VMware, and automation tools such as PowerShell or Ansible.

Qualifications

• Bachelor’s degree in technical discipline from an accredited college or university.
• 20 years’ experience as a System Engineer/System Administrator in programs with similar scope and complexity.
• Experience planning and leading Systems Engineering/Administration efforts.
• Windows Server administration, user accounts management, and GPO experience.
• Hands-on VMware vCenter and ESXi experience.
• Automation tools experience with Splunk, PowerShell or Ansible.
• IAT Level II certification with DoD 8140 compliance within 60 days.

Responsibilities

• Configure, administer, and maintain Windows Server OS, AD, and enterprise services.
• Administer VMware environments using vCenter/ESXi, focusing on accounts and VM troubleshooting.
• Support IT systems operations, client/server hardware, storage and network devices.
• Assist with basic Linux troubleshooting within enterprise environments.
• Support dispatch systems, hardware diagnostics, and problem resolution.
• Monitor system health and performance; conduct capacity analysis and tuning.
• Resolve Tier II/III hardware, OS, and software integration issues.

Skills

Windows Server Administration

VMware vCenter/ESXi

GPO / Active Directory

PowerShell / Ansible

Linux troubleshooting

Automation / Monitoring (Splunk)

IAT Level II Certification

Education

Bachelor’s degree in technical discipline

Tools

Active Directory

VMware vCenter

ESXi

Splunk

PowerShell

Ansible

Bash

NetApp storage

Job description

MANTECH in Laurel, MD seeks an experienced System Administrator to join our Enterprise Infrastructure Services team. You will help deliver enterprise infrastructure capabilities for a national defense mission, supporting Windows Server, VMware, AD, and cross-platform integration.

This role requires 20 years of systems engineering/administration experience, TS/SCI with Polygraph, and hands-on expertise with Windows Server, VMware, and automation tools such as PowerShell or Ansible.